org.springframework.expression.spel.ast
Class Selection

java.lang.Object
  extended by org.springframework.expression.spel.ast.SpelNodeImpl
      extended by org.springframework.expression.spel.ast.Selection
All Implemented Interfaces:
SpelNode

public class Selection
extends SpelNodeImpl

Represents selection over a map or collection. For example: {1,2,3,4,5,6,7,8,9,10}.?{#isEven(#this) == 'y'} returns [2, 4, 6, 8, 10] Basically a subset of the input data is returned based on the evaluation of the expression supplied as selection criteria.

Author:
Andy Clement

Field Summary
static int ALL
           
static int FIRST
           
static int LAST
           
 
Fields inherited from class org.springframework.expression.spel.ast.SpelNodeImpl
children, pos
 
Constructor Summary
Selection(boolean nullSafe, int variant, int pos, SpelNodeImpl expression)
           
 
Method Summary
 TypedValue getValueInternal(ExpressionState state)
           
 String toStringAST()
           
 
Methods inherited from class org.springframework.expression.spel.ast.SpelNodeImpl
getChild, getChildCount, getEndPosition, getObjectClass, getPreviousChild, getStartPosition, getValue, getValue, isWritable, nextChildIs, setValue
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

ALL

public static final int ALL
See Also:
Constant Field Values

FIRST

public static final int FIRST
See Also:
Constant Field Values

LAST

public static final int LAST
See Also:
Constant Field Values
Constructor Detail

Selection

public Selection(boolean nullSafe,
                 int variant,
                 int pos,
                 SpelNodeImpl expression)
Method Detail

getValueInternal

public TypedValue getValueInternal(ExpressionState state)
                            throws EvaluationException
Specified by:
getValueInternal in class SpelNodeImpl
Throws:
EvaluationException

toStringAST

public String toStringAST()
Specified by:
toStringAST in interface SpelNode
Specified by:
toStringAST in class SpelNodeImpl
Returns:
the string form of this AST node